/* Browser check */
IS_DOM = (document.getElementById) ? true : false;
IS_IE = (document.all) ? true : false;
IS_IE50 = (navigator.userAgent.indexOf("IE 5.0") != -1);
IS_Mac = (navigator.appVersion.indexOf("Mac") != -1);

// preload level 1 buttons
var btnLevel1 = new Array();
btnLevel1 = ["", "micro-optics-components", "endoscopes-couplers", "custom-optics-solutions", "applications", "brochures-literature", "about-us"];
for (var i = 0; i < btnLevel1.length; i++) { 
	eval("menu" + i + "on = new Image();"); eval("menu" + i + "off = new Image();");
	eval("menu" + i + "on.src = \"" + sFolderLevel + "img/navigation/l1-" + btnLevel1[i] + "-r.gif\";");
	eval("menu" + i + "off.src = \"" + sFolderLevel + "img/navigation/l1-" + btnLevel1[i] + "-0.gif\";");
	if (sSelectedButton == btnLevel1[i]) {
		eval("menu" + i + "off.src = \"" + sFolderLevel + "img/navigation/l1-" + btnLevel1[i] + "-r.gif\";");
	}
}

// preload constants
var btnLevel1 = new Array();
btnLevel1 = ["", "home","contact-us"];
for (var i = 0; i < btnLevel1.length; i++) { 
	eval("A" + i + "on = new Image();"); eval("A" + i + "off = new Image();");
	eval("A" + i + "on.src = \"" + sFolderLevel + "img/navigation/" + btnLevel1[i] + "-r.gif\";");
	eval("A" + i + "off.src = \"" + sFolderLevel + "img/navigation/" + btnLevel1[i] + "-0.gif\";");
	if (sSelectedButton == btnLevel1[i]) {
		eval("A" + i + "off.src = \"" + sFolderLevel + "img/navigation/" + btnLevel1[i] + "-r.gif\";");
	}
}

// Image Swapping
function changeImages() 
{
  if (document.getElementById) {
    for (var i = 0; i < changeImages.arguments.length; i += 2) { 
  		document.getElementById(changeImages.arguments[i]).src = eval(changeImages.arguments[i + 1] + ".src"); 
	}
  }
}

// Get an ID 
function getThis(sId)
{
	var oObject;
	oObject = false;
	
	if (IS_DOM) {
		if (document.getElementById(sId)) {
			oObject = document.getElementById(sId);
		}
	}
	
	return oObject;
}